December Weather in Kahului, United States

Last updated: February 24, 2025

Experience the charm of Kahului, United States in December, where temperatures range from a cozy 18°C (65°F) at night to a delightful 29°C (85°F) during the day, with an overall average around 24°C (75°F). Amidst the tropical ambiance, enjoy occasional rainfall, with 45 mm (1.8 in) of precipitation spread across 11 days, adding to the region's lush beauty. With humidity levels around 81%, the weather invites visitors to bask in the warmth while embracing the fresh, inviting island air. Whether you're exploring the scenic landscapes or relaxing on the beach, December in Kahului offers a perfect blend of comfort and adventure.

December Temperature in Kahului

In Kahului, United States, December sees a refreshing transition as temperatures cool slightly, with minimums averaging around 18°C (65°F), while averages hover at a comfortable 24°C (75°F). As the month progresses, residents and visitors can enjoy a pleasant maximum temperature of about 29°C (85°F), making it the ideal time for outdoor activities. Notably, December marks a consistency in the warm climate that characterizes the region throughout the year, with minimal fluctuations in average temperatures compared to previous months. The gradual dip towards the end of the year emphasizes Kahului's mild winter, making it a charming destination for those looking to escape harsher climates.

December Weather in Kahului: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Kahului, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec747373757779798080797775
Data source: Temperature data for Kahului generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Kahului

In Kahului, December marks a notable increase in precipitation, with the month receiving 45 mm (1.8 in) of rain over 11 days. This uptick is reflective of a trend where the latter part of the year typically sees higher rainfall compared to the drier summer months. Following November's average of 25 mm (1.0 in) across 7 days, December's weather not only signals the arrival of winter but also sets the stage for the wetter months ahead, contrasting sharply with the dry spell experienced in June, which recorded only 11 mm (0.4 in) over a mere 2 days. As the year closes, residents can expect more frequent rainfall, contributing to the lush landscapes that characterize this beautiful Hawaiian island.

December Precipitation Trends in Kahului

The chart displays monthly precipitation patterns in Kahului, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec327552493611232517402545
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kahului

In Kahului, United States, December brings a slight retreat from the peak humidity experienced during the summer months. With an average humidity of 81%, this month marks a subtle decline from the 85% recorded in both July and August. Throughout the year, humidity levels steadily rise from January's 78%, reaching their zenith in the mid-year, before beginning a gradual descent as autumn transitions into winter. December's humidity reflects this pattern, providing a hint of relief as the air becomes a touch less heavy, yet still comfortably moist, characteristic of this tropical locale.

December Average Humidity in Kahului

This chart illustrates the average monthly humidity levels in Kahului, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec79%79%79%82%83%84%85%85%84%83%82%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kahului

In December, Kahului experiences a UV Index of 8, placing it in the very high exposure category, with a burn time of 15 minutes. This marks a slight decrease from the extreme levels seen earlier in the summer months, where the UV Index peaked at 13 from June to August. However, December's index remains significantly elevated compared to the lower values during the winter months in earlier parts of the year, notably 7 in January and 10 in February. Such trends highlight the importance of sun protection throughout the year in Kahului, even as the holiday season approaches. For more detailed information and to plan your sun-safe activities, visit Kahului UV Index.

Maximum UV Index Levels in Kahului for December

The chart shows the monthly maximum UV Index (UVI) for Kahului in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec710111212131313121188
Data source: Kahului December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Kahului

Kahului basks in a warm embrace of sunshine through the year, with December offering a notable 264 hours of sunlight. As winter approaches, the days might become shorter, but this month still reflects a vibrant glow, consistent with the sunny patterns observed from early autumn. After peaking in the summer months of June and July—where sun-soaked skies deliver 342 and 349 hours, respectively—the sunlight hours begin to wane slightly as the year ends. Interestingly, December's sunshine holds strong when compared to earlier months, with only a modest decline from November’s 272 hours. This trend highlights Kahului's appealing climate, making it a splendid time for both residents and visitors to revel in the warmth as they prepare for the festive season ahead.

Monthly Sunshine Duration in Kahului: December Highlighted

The December sunshine duration represents the total number of hours Kahului experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec222h255h290h311h335h342h349h335h316h301h272h264h
Data source: Kahului December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Kahului During December

In Kahului, the chances of enjoying sunny weather in December are noticeably lower than in other months, with only a 37% likelihood of clear skies. This decline in sunshine is part of a broader trend as the year progresses; while August boasts a robust 69% chance of sun, the likelihood steadily decreases towards the year’s end. Notably, as we move from November's 61% down to December, the drop in sunny days signals an onset of winter weather patterns. Overall, if you're planning a December visit, be prepared for more overcast days and potentially less time basking in the sun.

Percentage of Sunny Days in December in Kahului

The chart illustrates the percentage of sunny days in Kahului throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Kahului experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec55%61%50%57%59%58%51%69%61%66%61%37%
Data source: Kahului December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Kahului in December

In Kahului, December brings a shift in daylight duration, offering only 10 hours of sunlight. This marks the low point in a year that starts with a consistent 11 hours of daylight in both January and February. As spring approaches, daylight begins to extend, peaking at 13 hours during the summer months of May through July. Following the peak, daylight hours gradually decrease again, with shifts back to 12 hours in August and September, before returning to 11 hours in October and November. This cyclical trend highlights the striking contrast between the vibrant summer days and the shorter, more serene winter months in this beautiful Hawaiian locale.

Average Daylight Hours in Kahului for December

The chart illustrates the variation in daylight duration in Kahului throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h11h 27m12h 2m12h 38m13h 7m13h 22m13h 14m12h 47m12h 13m11h 37m11h 7m10h 52m
Data source: Kahului daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Kahului

As December rolls into Kahului, the winds settle into a moderate rhythm, with an average wind speed of 4.8 m/s (11 mph), which mirrors the calmness of earlier months like January and May. Throughout the year, wind speeds fluctuate, peaking in the summer with a notable 5.6 m/s (13 mph) in July, while November experiences a dip, dropping to 3.6 m/s (8 mph)—the year's lowest point. This seasonal shift suggests a gentle transition into winter, as December maintains a consistent breeze reminiscent of the beginning of the year. Whether you're surfing the waves or strolling along the shore, the December winds provide a comfortable embrace, punctuating the serene coastal atmosphere of Kahului.

Average December Wind Speed in Kahului

The chart displays monthly wind speed patterns in Kahului, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.84.64.74.24.84.65.64.95.05.23.64.8 m/s
Data source: Kahului December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Kahului Compares to Other Months

The weather in Kahului changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Kahului and find detailed weather information for every month.

In December, the weather features a temperature range with a minimum of 18°C (65°F) and a maximum of 29°C (85°F), accompanied by an average temperature of 24°C (75°F). This month experiences an average rainfall of 45 mm (1.8 in) over 11 days, with a relatively high humidity level of 81%.

In contrast, January sees slightly warmer minimum temperatures at 19°C (66°F) but a lower average temperature of 23°C (74°F) and a maximum of 28°C (83°F). The month is drier, with only 32 mm (1.3 in) of precipitation over just 5 days, and humidity decreases to 78%. For more detailed information, you can check out Kahului weather in January.

In December, the weather features slightly warmer temperatures, with a minimum of 18°C (65°F) and an average of 24°C (75°F), reaching up to a maximum of 29°C (85°F). The month experiences around 45 mm (1.8 in) of precipitation over 11 days, with an average humidity of 81%. In comparison, February sees a minor drop in temperature, with a minimum of 16°C (61°F) and an average of 23°C (73°F), while the maximum is slightly lower at 28°C (83°F). However, February is wetter, accumulating 75 mm (2.9 in) of rain over 10 days, with humidity levels hovering around 79%. For more insights on February weather, you can visit Kahului weather in February.

In December, the weather remains warm with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), and an average of 24°C (75°F). The month experiences 45 mm (1.8 in) of precipitation over 11 days, resulting in a relatively high humidity level of 81%. In contrast, March features a similar temperature range, with the minimum and maximum readings staying consistent at 18°C (64°F) and 29°C (84°F) respectively, but the average dips slightly to 23°C (74°F). Precipitation increases to 52 mm (2.0 in) over 10 days, with humidity decreasing slightly to 79%. Overall, both months maintain warm weather, but March tends to be slightly cooler and wetter compared to December. For more details, check out Kahului weather in March.

In December, the weather features warm temperatures with a minimum of 18°C (65°F) and a maximum of 29°C (85°F), while experiencing an average temperature of 24°C (75°F). The month typically sees about 45 mm (1.8 in) of precipitation over 11 days, coupled with a humidity level of 81%.

In contrast, April presents slightly warmer nights with a minimum temperature of 19°C (66°F) and the same maximum of 29°C (84°F), maintaining the average at 24°C (75°F). Precipitation increases marginally to 49 mm (1.9 in), occurring over 9 days, with humidity levels slightly higher at 82%.

For more detailed insights, you can check out Kahului weather in April.

December and May offer distinct weather experiences. In December, temperatures range from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), with an average of 24°C (75°F). The month sees approximately 45 mm (1.8 in) of precipitation over 11 days, and humidity levels remain high at 81%. In contrast, May features slightly warmer conditions, with temperatures ranging from 19°C (66°F) to 31°C (88°F) and an average of 25°C (77°F). Precipitation drops to about 36 mm (1.4 in) over just 6 days, while humidity increases slightly to 83%. For a more detailed look at the weather in May, you can visit Kahului weather in May.

December and June weather exhibit notable differences. In December, temperatures range from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), with an average temperature of 24°C (75°F). The month experiences higher precipitation, totaling 45 mm (1.8 in) over about 11 days, contributing to a humidity level of 81%. In contrast, June showcases warmer temperatures, with a minimum of 22°C (72°F) and a maximum of 31°C (88°F), averaging 26°C (79°F). Notably, June sees significantly less rain, with only 11 mm (0.4 in) falling over just 2 days, resulting in a slightly higher humidity of 84%. For more detailed information, you can explore Kahului weather in June.

In December, the weather typically features milder temperatures, with a minimum of 18°C (65°F), an average of 24°C (75°F), and a maximum reaching 29°C (85°F). The month tends to be wetter, recording around 45 mm (1.8 in) of precipitation over approximately 11 days, coupled with a humidity level of 81%. In contrast, July experiences warmer weather, starting with a minimum of 22°C (73°F), an average of 26°C (80°F), and a maximum temperature of 31°C (88°F). The month is relatively drier, with only 23 mm (0.9 in) of rain over 4 days, and slightly higher humidity at 85%. For a detailed insight into July's weather, you can visit Kahului weather in July.

December and August in Kahului present contrasting weather patterns. In December, temperatures range from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), with an average of 24°C (75°F). The month sees about 45 mm (1.8 in) of rainfall over 11 days, alongside a humidity level of 81%. In contrast, August is warmer with minimum temperatures at 22°C (72°F) and maximums reaching 31°C (89°F), averaging 27°C (80°F). Rainfall in August is notably less, totaling 25 mm (1.0 in) across just 5 days, but the humidity is somewhat higher at 85%. For more detailed insights, check out Kahului weather in August.

When comparing December and September weather, December tends to be slightly cooler, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), while September features warmer averages, ranging from a minimum of 23°C (73°F) to a maximum of 32°C (89°F). Precipitation is more prevalent in December, with 45 mm (1.8 in) occurring over 11 days, compared to just 17 mm (0.7 in) over 4 days in September. Despite December's lower average temperatures, it maintains a high humidity level of 81%, which is only slightly less than September's 84%. For a more detailed look at September's climate, you can explore Kahului weather in September.

In comparing the weather of December and October, we can observe a few noteworthy differences. December tends to be slightly cooler, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 29°C (85°F), while October boasts a warmer average, with minimums of 21°C (70°F) and maximums reaching 31°C (88°F). Precipitation levels are relatively similar, with December experiencing 45 mm (1.8 in) over 11 days, compared to October's 40 mm (1.6 in) across just 7 days. Humidity remains quite high in both months, at 81% in December and 83% in October, making the air feel quite moist throughout the period. For a closer look at October's specific weather conditions, you can check out Kahului weather in October.

In comparing the weather conditions of December and November, we see notable differences in temperature and precipitation. December experiences slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum of 29°C (85°F), while November boasts a minimum of 19°C (67°F) and can reach a high of 31°C (87°F). Precipitation levels are higher in December, totaling 45 mm (1.8 in) over 11 days, compared to November's 25 mm (1.0 in) spread across only 7 days. Humidity remains relatively similar, with December at 81% and November at 82%. For additional insights, you can explore Kahului weather in November.

Compare Kahului's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Kahului

As December settles in Kahului, the weather presents a refreshing contrast to the warmer months. With temperatures cooling to an average of 24°C, the island experiences a delightful blend of warmth and crispness, making outdoor activities particularly enjoyable. However, this month also ushers in increased humidity and a notable rise in precipitation, with rain falling on about 11 days of the month. This shift not only enhances the lush landscapes but also invites visitors to embrace the tropical charm of the island. Overall, December is a unique time to experience Kahului’s climate. For more insights, visit Kahului Climate.